How do I renew an expired Ubuntu OpenLDAP SSL Certificate

http://serverfault.com –
We went through the steps of revoking an SSL Certificate used by our OpenLDAP server and renewing it but we are unable to start slapd.
Here are the commands we used:
openssl verify hostname_domain_com_cert.pem
We got back that the certificate was expired but "OK"
We revoked the certificate we'd been using:
openssl ca -revoke /etc/ssl/certs/hostname_domain_com_cert.pem
Revoking worked fine.
We created the new Cert Request by passing it the key file as input:
openssl req -new -key hostname_domain_com_key.pem -out newreq.pem
We generated a new certificate using the newly cr
(HowTos)

I am using openssl s_client -showcerts -connect test.abc.com:443 -state -debug to check the server certificate. The server is using nginx. But when i request the above openssl shows the server certificate as *.xyz.com. I want to know where openssl is getting this as the server certificate. OS is Linux.